Is anyone else having problems with a changing IP address?

I finally suffered through an hour-long call with T-Mobile.  They said there is no fix.  Our T-Mobile Home Internet routers jump back and forth between towers like a phone.  There will never be a fix, she said.

I asked why the problem just started for me a month ago.  She said the IP situation has always been like this but websites recently started cracking down due to security concerns.

She said Google Mesh might solve it.  I can't understand why that would be.  I'm not throwing more money at this.  

So I have paid services that lock me out because they think I'm sharing my account.  I have bank transactions that don't go through, so I get past due notices.  I have sites I need to access for work that lock me out because they say the IP that requested the data is no longer the IP they're detecting.